1 files changed, 166 insertions, 0 deletions
diff --git a/bridge/monitor.c b/bridge/monitor.c
new file mode 100644
index 0000000..552614d
--- /dev/null
+++ b/bridge/monitor.c
@@ -0,0 +1,166 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * brmonitor.c		"bridge monitor"
+ *
+ * Authors:	Stephen Hemminger <shemminger@vyatta.com>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <linux/if_bridge.h>
+#include <linux/neighbour.h>
+#include <string.h>
+
+#include "utils.h"
+#include "br_common.h"
+
+
+static void usage(void) __attribute__((noreturn));
+static int prefix_banner;
+
+static void usage(void)
+{
+	fprintf(stderr, "Usage: bridge monitor [file | link | fdb | mdb | vlan | vni | all]\n");
+	exit(-1);
+}
+
+static int accept_msg(struct rtnl_ctrl_data *ctrl,
+		      struct nlmsghdr *n, void *arg)
+{
+	FILE *fp = arg;
+
+	switch (n->nlmsg_type) {
+	case RTM_NEWLINK:
+	case RTM_DELLINK:
+		return print_linkinfo(n, arg);
+
+	case RTM_NEWNEIGH:
+	case RTM_DELNEIGH:
+		return print_fdb(n, arg);
+
+	case RTM_NEWMDB:
+	case RTM_DELMDB:
+		return print_mdb_mon(n, arg);
+
+	case NLMSG_TSTAMP:
+		print_nlmsg_timestamp(fp, n);
+		return 0;
+
+	case RTM_NEWVLAN:
+	case RTM_DELVLAN:
+		return print_vlan_rtm(n, arg, true, false);
+
+	case RTM_NEWTUNNEL:
+	case RTM_DELTUNNEL:
+		return print_vnifilter_rtm(n, arg);
+
+	default:
+		return 0;
+	}
+}
+
+void print_headers(FILE *fp, const char *label)
+{
+	if (timestamp)
+		print_timestamp(fp);
+
+	if (prefix_banner)
+		fprintf(fp, "%s", label);
+}
+
+int do_monitor(int argc, char **argv)
+{
+	char *file = NULL;
+	unsigned int groups = ~RTMGRP_TC;
+	int llink = 0;
+	int lneigh = 0;
+	int lmdb = 0;
+	int lvlan = 0;
+	int lvni = 0;
+
+	rtnl_close(&rth);
+
+	while (argc > 0) {
+		if (matches(*argv, "file") == 0) {
+			NEXT_ARG();
+			file = *argv;
+		} else if (matches(*argv, "link") == 0) {
+			llink = 1;
+			groups = 0;
+		} else if (matches(*argv, "fdb") == 0) {
+			lneigh = 1;
+			groups = 0;
+		} else if (matches(*argv, "mdb") == 0) {
+			lmdb = 1;
+			groups = 0;
+		} else if (matches(*argv, "vlan") == 0) {
+			lvlan = 1;
+			groups = 0;
+		} else if (strcmp(*argv, "vni") == 0) {
+			lvni = 1;
+			groups = 0;
+		} else if (strcmp(*argv, "all") == 0) {
+			groups = ~RTMGRP_TC;
+			lvlan = 1;
+			lvni = 1;
+			prefix_banner = 1;
+		} else if (matches(*argv, "help") == 0) {
+			usage();
+		} else {
+			fprintf(stderr, "Argument \"%s\" is unknown, try \"bridge monitor help\".\n", *argv);
+			exit(-1);
+		}
+		argc--;	argv++;
+	}
+
+	if (llink)
+		groups |= nl_mgrp(RTNLGRP_LINK);
+
+	if (lneigh) {
+		groups |= nl_mgrp(RTNLGRP_NEIGH);
+	}
+
+	if (lmdb) {
+		groups |= nl_mgrp(RTNLGRP_MDB);
+	}
+
+	if (file) {
+		FILE *fp;
+		int err;
+
+		fp = fopen(file, "r");
+		if (fp == NULL) {
+			perror("Cannot fopen");
+			exit(-1);
+		}
+		err = rtnl_from_file(fp, accept_msg, stdout);
+		fclose(fp);
+		return err;
+	}
+
+	if (rtnl_open(&rth, groups) < 0)
+		exit(1);
+
+	if (lvlan && rtnl_add_nl_group(&rth, RTNLGRP_BRVLAN) < 0) {
+		fprintf(stderr, "Failed to add bridge vlan group to list\n");
+		exit(1);
+	}
+
+	if (lvni && rtnl_add_nl_group(&rth, RTNLGRP_TUNNEL) < 0) {
+		fprintf(stderr, "Failed to add bridge vni group to list\n");
+		exit(1);
+	}
+
+	ll_init_map(&rth);
+
+	if (rtnl_listen(&rth, accept_msg, stdout) < 0)
+		exit(2);
+
+	return 0;
+}